In the reaction 2h2 + o2 > 2h2o, what coefficient should be placed in front of o2 to balance the reaction?

Which articulations allow for greatest range of motion?

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?

Aball is thrown from the top of a building with an initial velocity of 21.9 m/s straight upward, at an initial height of 51.6 m above the ground. the ball just misses the edge of the roof on its way down, as shown in the figure. (a) determine the time needed for the ball to reach its maximum height. (b) determine the maximum height. (c) determine the time needed for the ball to return to the height from which it was thrown, and the velocity of the ball at that instant. (d) determine the time needed for the ball to reach the ground. (e) determine the velocity and position of the ball at t = 5.35 s.